Tunneling transmission in two quantum wires coupled by a magnetically defined barrier
文献类型：期刊论文
| 作者 | Sheng WD ; Gu BY ; Wang J ; Xia JB |
| 刊名 | journal of applied physics
 |
| 出版日期 | 1997 |
| 卷号 | 82期号:12页码:6083-6088 |
| 关键词 | BALLISTIC-ELECTRON-TRANSPORT DIRECTIONAL COUPLER WAVE-GUIDE FIELDS INTERFERENCE CONDUCTANCE MOTION |
| ISSN号 | 0021-8979 |
| 通讯作者 | sheng wd,ccast,world lab,pob 8730,beijing 100080,peoples r china. |
| 中文摘要 | a numerical analysis of an electron waveguide coupler based on two quantum wires coupled by a magnetically defined barrier is presented with the use of the scattering-matrix method. for different geometry parameters and magnetic fields, tunneling transmission spectrum is obtained as a function of the electron energy. different from that of conventional electron waveguide couplers, the transmission spectrum of the magnetically coupled quantum wires does not have the symmetry with regard to those geometrically symmetrical ports, it was found that the magnetic field in the coupling region drastically enhances the coupling between the two quantum wires for one specific input port while it weakens the coupling for the other input port. the results can be well understood by the formation of the edge states in the magnetically defined barrier region. thus, whether these edge states couple or decouple to the electronic propagation modes in the two quantum wires, strongly depend on the relative moving directions of electrons in the propagating mode in the input port and the edge states in the magnetic region. this leads to a big difference in transmission coefficients between two quantum wires when injecting electrons via different input ports. two important coupler specifications, the directivity and uniformity, are calculated which show that the system we considered behaves as a good quantum directional coupler. (c) 1997 american institute of physics. |
| 学科主题 | 半导体物理 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2010-08-12 |
| 源URL | [http://ir.semi.ac.cn/handle/172111/13320]  |
| 专题 | 半导体研究所_中国科学院半导体研究所（2009年前） |
| 推荐引用方式 GB/T 7714 | Sheng WD,Gu BY,Wang J,et al. Tunneling transmission in two quantum wires coupled by a magnetically defined barrier[J]. journal of applied physics,1997,82(12):6083-6088. |
| APA | Sheng WD,Gu BY,Wang J,&Xia JB.(1997).Tunneling transmission in two quantum wires coupled by a magnetically defined barrier.journal of applied physics,82(12),6083-6088. |
| MLA | Sheng WD,et al."Tunneling transmission in two quantum wires coupled by a magnetically defined barrier".journal of applied physics 82.12(1997):6083-6088. |
入库方式： OAI收割
来源：半导体研究所
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